Graphene oxide integrated sensor for electrochemical monitoring of mitomycin C–DNA interaction
Makaleler > Tam Makale · 2012
Yazarlar: Kadriye Arzum ERDEM GÜRSAN, Mihrican MUTİ, Pagona PAPAKONSTANTİNOU, Ece CANAVAR, Hakan KARADENİZ, Gulsah CONGUR, Surbhi SHARMA
The Analyst, SCI Expanded İndekslerine Giren Dergi, Uluslararası, Wos, 2012, cilt 137, ss 2129-2129
DOI: 10.1039/c2an16011k
Özet
We present a graphene oxide (GO) integrated disposable electrochemical sensor for the enhanced detection of nucleic acids and the sensitive monitoring of the surface-confined interactions between the anticancer drug mitomycin C (MC) and DNA. Interfacial interactions between immobilized calf thymus double-stranded (dsDNA) and anticancer drug MC were investigated using differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS) techniques. Based on three repetitive voltammetric measurements of 120 μg mL(-1) DNA immobilized on GO-modified electrodes, the RSD % (n = 3) was calculated as 10.47% and the detection limit (DL) for dsDNA was found to be 9.06 μg mL(-1). EIS studies revealed that the binding of the drug MC to dsDNA leads to a gradual decrease of its negative charge. As a consequence of this interaction, the negative redox species were allowed to approach the electrode, and thus increase the charge transfer kinetics. On the other hand, DPV studies exploited the decrease of the guanine signal due to drug binding as the basis for specifically probing the biointeraction process between MC and dsDNA.